RZW02.1-075-015 Bosch Rexroth Indramat
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MPN: R911200991
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The Bosch Rexroth Indramat RZW02.1-075-015 is part of the RZW Braking Resistors series and has a power rating of 75 kW with a resistance of 5.1 Ohms. It features an IP20 protection class, weighs 33 kilograms, and measures 800 mm in depth, 490 mm in width, and 270 mm in height. The braking resistor supports a maximum on-time of 18 seconds and an operating factor of 15 percent.
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Product Description:
The RZW02.1-075-015 braking resistor is produced by Bosch Rexroth Indramat for the RZW Braking Resistors series. This component connects to the DC link of a drive controller and dissipates surplus kinetic energy as heat during rapid deceleration or positioning cycles in industrial automation. The unit has design 1 and belongs to line 2, providing a consistent mechanical footprint and wiring arrangement within the platform. By converting electrical energy into thermal output, it protects power modules and helps maintain a stable bus voltage when axes brake abruptly.
During intermittent operation, the resistor can absorb 75 kW of thermal power with a nominal resistance of 5.1 Ω and the allowable current flowing through the steel grid. An operating duty cycle of 15% SD limits average loading so the element can cool between braking bursts. During each 120-second load cycle, the device may conduct for a maximum of 18 s, followed by an inactive period of 102 s to prevent the enclosure from overheating. The thermal time constant is 100 s, which indicates the period required for the internal temperature to reach approximately 63 percent of its final value after power is applied. This thermal behavior helps the connected drive controller manage the timing and duration of repeated braking pulses.
The ventilated grille has an IP20 protection rating, which prevents accidental contact with internal components while permitting airflow through the housing. The cabinet footprint measures 490 mm wide, 800 mm deep, and 270 mm high, while the assembly has a mass of 33 kg. Its size and weight should be considered when selecting mounting supports and planning how the unit will be positioned inside an enclosure. Power leads with conductor cross sections of up to 50 mm² attach to M10 terminals, providing secure connections for the braking circuit. When multiple units are connected in parallel, the resistor arrangement can support bus circuits with resistance values as low as 3.75 Ω. Adequate clearance around the grille allows heat to escape during successive braking events without obstructing cabinet ventilation.
